com.act365.sudoku
Class LinearSystemState

java.lang.Object
  com.act365.sudoku.LinearSystemState

All Implemented Interfaces:

IState

public class LinearSystemState

extends java.lang.Object

implements IState

LinearSystemState stores the system of linear equations defined by the Sudoku puzzle.

Field Summary

static int	defaultDisplayFormat
static int	EQUATIONS
static int	MATRIX

Constructor Summary

LinearSystemState()

Method Summary

void	addMove(int x, int y, int v) Adds the constraint (x,y):=v to the system and reduces.
void	eliminateMove(int x, int y, int v) Updates the state grid to account for the fact that the move (x,y):=v has been eliminated as a possibility.
void	popState(int nMoves) Unwinds a state grid from the thread.
void	pushState(int nMoves) Adds a state grid to the thread.
void	setup(int boxesAcross, int boxesDown) Sets up the state grid and its thread.
java.lang.String	toString() String representation
java.lang.String	toString(int v, int displayFormat) String representation of the equations for the chosen value in the chosen display format.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

EQUATIONS

public static final int EQUATIONS

See Also:

Constant Field Values

MATRIX

public static final int MATRIX

See Also:

Constant Field Values

defaultDisplayFormat

public static int defaultDisplayFormat

Constructor Detail

LinearSystemState

public LinearSystemState()

Method Detail

setup

public void setup(int boxesAcross,
                  int boxesDown)

Description copied from interface: IState

Sets up the state grid and its thread.

Specified by:

setup in interface IState

See Also:

IState.setup(int, int)

pushState

public void pushState(int nMoves)

Description copied from interface: IState

Adds a state grid to the thread.

Specified by:

pushState in interface IState

Parameters:

nMoves - thread position to which state should be written

See Also:

IState.pushState(int)

popState

public void popState(int nMoves)

Description copied from interface: IState

Unwinds a state grid from the thread.

Specified by:

popState in interface IState

Parameters:

nMoves - thread position from which state should be read

See Also:

IState.popState(int)

addMove

public void addMove(int x,
                    int y,
                    int v)
             throws MoveException

Adds the constraint (x,y):=v to the system and reduces.

Specified by:

addMove in interface IState

Throws:

MoveException

See Also:

IState.addMove(int, int, int)

eliminateMove

public void eliminateMove(int x,
                          int y,
                          int v)

Description copied from interface: IState

Updates the state grid to account for the fact that the move (x,y):=v has been eliminated as a possibility.

Specified by:

eliminateMove in interface IState

See Also:

IState.eliminateMove(int, int, int)

toString

public java.lang.String toString()

String representation

Specified by:

toString in interface IState

toString

public java.lang.String toString(int v,
                                 int displayFormat)

String representation of the equations for the chosen value in the chosen display format.